Double-drum hoist



Juiy 27' 1926, 1,593,595

A. E. PETERS DOUBLE DRUM HOIST Filed July 5. 1925 2 Sheets-Sheat LiNVENTOR HIS ATTQMAEY July 27 192 6.

' A. E. PETER DOUBLE DRUM HOIST 2 Sheets-Sheet 2 INVENTOR j rifiwllefenfi HIS ATT RNEY Filed July JV 1925 Patented July 27, 1926.

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ARTHUR E. PETERS, OF LITTLETON, COLORADO, ASSIGNOB T0 ING-EBFQOLL-BANIDCOM- PANY, OF JERSEY CITY, NEW JERSEY, A CORPORATION OF NEW JERSEY.

" DOUBLE-DRUM Horsr.

Application filed July 3, 1925. 'Serial No. 41,295.

This invention relates to hoists, but more particularly to a powerdriven hoist of the double drum type in which either drum may be drivenselectively from the common driving shaft.

The objects of this invention are to enable two drums, as for instance,the haulage drum and a tail-rope drum to be driven from a non-reversiblesource of power as for instance an air motor or an electric motor byimproved means and devices which enable one drum to be automaticallyconnected with the driving element while the other drum issimultaneously disconnected from the driving element, although the motor always rotates in the same direction.

Other objects will be in part obvious and in part pointed outhereinafter.

The invention consists of the combinations of elements, features ofconstruction and arrangement of parts having the gen eral mode ofoperationsubstantially as hereinafter described and more particularlypointed out in the appended claims and illustrated in the accompanyingdrawings in which Figure 1 is a longitudinal view in elevation, partlyin section, of a hoist constructed in accordance with the practice ofthe invention Figure 2 is a plan view in section taken on the line 2-2through Figure 1 looking in the direction of the arrows, s

Figure 3 is a view taken through Figure 1 on the line 83 looking in thedirection of the arrows, and e Figure 4 is a transverse section takenthrough Figure 1 on the line 44 looking in the direction of the arrows.

Referring to the drawing is shown embodied in a motor hoist of thedouble drum type in which a base plate A supports at one end a gearcasing B and at its other end a cylinder C. In this instance, anon-reversible fluid actuated motor is indicated in which a piston D ofthe square type is adapted to reciprocate with in the cylinder C for.'rotating a driving shaft E. Any suitablemeans may be 'provided forconnecting the piston D with the driving shaft E as for instance, acrank pin F provided with a frictionless bearing Gr housed within oneside of the piston D. A. valve casing I-I forms a cover for one side s;the invention of the cylinder C and is suitably secured thereto as bymeans of bolts J. Pressure fluid to the valve casing H may be suppliedthrough a connection K and the supply of pressure fluid for actuatingthe piston D is controlled by a suitable throttle valve H in the valvecasing I-I having a throttle rotate in only one direction irrespectiveofv the position of. the handle L. Pressure fluid is exhausted from themotor through suitable outlet connections 0 secured to the valve casingII and preferably arranged so that the exhaust of pressure fluid isdirected.

downwardly.

In this instance, a center bearing P en cases the driving shaft E andhas a flange Q at one end to form a cover for one side of the cylinderC. The center bearing P like the valve casing H, is held in positioninto the flange Q. The driving shaft E is preferably arrangedconcentrically with the center bearing P and is provided at its endswith frictionless bearings R supported by said center bearing. In thisinstance, a tailrope drum is journalled on the center bearing P and isprovided with a shoulder U which abutsa shoulder V formed .on the centerbearing for preventingendwis'e move ment of said drum in one direction.A bushing IN is mounted loosely on the center bearing P and carries atone end clutch members X which are adapted to cooperate with similarclutch members Y formed on the drum S for rotating said drum. The clutchmembers X and Y may be of any suitable form, but are preferably of adesign which will eliminate end thrust. In addition to serving as anextension for the drum S, the bushing IV also serves as a bearing for ahaulage drum T which is mounted loosely upon said bushing.

To the end that longitudinal movement of the drums S and T and thebushing W may be limited, the end of the center bearby the bolts J whichare screw threaded.

fit)

ing P is threaded as at Z to receive a correspondingly threaded collar7). The collar b may be provided with a tapped hole 0 to receive anysuitable threaded instrument for removing said collar from the centerbearing.

In this instance, rotary motion from the driving shaft E is imparted tothe tail-rope drum S by a train of gears comprising a driving pinion 65secured to the end of the driving shaft E, and which pinion is inconstant mesh with an intermediate gear 6 mounted loosely on a shaft f.The shaft carries at one end an intermediate pinion g which meshes witha ear h preferably formed integrally with the bushing W. A somewhatsimilar train of gearing is provided for driving the haulage drum. Inthis instance an intermediate gear j, of substantially the sameformation as the gear 6, is mounted loosely upon a shaft It and like thegear 0 is in constant mesh with the driving pinion (Z. An intermediatepinion 0 is keyed to theend of the shaft is and meshes with an internalgear carried by a flange q of the drum T.

In order to reduce friction between the intermediate gears 13 and j andthe shafts f and respectively, suitable frictionless bearings 1' areprovided as are also bearings a and t for the outer and inner endsrespectively of the shafts .lc and f. A cover a is provided for the gearcasing B to protect the mechanisms in said casing against dust and dirtand .may be secured in po sition in any suitable manner, as forinstance, by bolts .2; extending through the cover and screwed into thecasing B.

Usually in machines of this character, a braking element is provided. Inthis instance, a separate brake in the form of a "hand 20 is providedfor each drum. .Any suitable mechanism may be provided for manipulatingthese bands, but such mechanism preferably consists of means which willautomatically produce a drag on the drums when the drums aredisconnected from the driving element.

In accordance with the practice of the invention, a clutch yoke a: isarranged in the gear casing B and is secured at its center to arotatable rod y .by means of .a pin a which preferably extends throughthe yoke and the rod y and may be held against displacement in anysuitable manner as for instance cotter pins 2. The yoke 03 is prefcrablyformed in half (sections which may be secured together by bolts 3.

In order to enable one or the other of the drums :to be connectedselectively with the driving element, clutch members 4 and 5, preferablyoff-set from the longitudinal axis of the hoist are arranged slidably onthe shafts 7c and f respectively, and .are provided with a polygonalbore 6 to cooperate with a correspondingly formed portion 7 of saidshafts for preventing rotation of the clutch members with respect tosaid shafts. Clutch teeth 8 are secured to the intermediate gears and eto cooperate with the clutch members -'i and 5 respectively. In thisinstance, clutch collars are provided for the clutch members i and 5 andare held in position by nuts 10 screwed on one end of said clutchmembers. The collars 9 are connected pivotally to the yoke a by means oftrunnions ll carried by said collars. In order to reduce frictionbetween the clutch collar 9 and a flange 12 of the clutch members i and5, a frictionless bearing 13 is interposed between said collar and saidflange.

Suitable means are provided for automatically actuating the clutch yokefo sliding the clutch member 5 into engagement with the teeth 8 on theintermediate gear 6 simultaneously with the admission of pressure fluidto the motor. To this end, a cylinder 14: prefcrablv formed integralwith a bearing plate 15, is provided with a plunger 16 which abuts atits forward end the yoke 0:. Pressure fluid for actuac ing the plunger16 is conveyed from the valve casing H through a pipe 17 communicatingwith a passage 18 formed in the base plate A and thence through apassage ii formed in the gear casing B and through a pipe 20 connectingthe passage 19 with the rearward end of the cylinder 1i. ,i cover plate21 forms a closure for the rear end of the cylinder ll and is secured inposition by means of bolts The e);- hanst of pressure fluid from thecylinder 14 is in this instance controlled by the throttle handle L.

In order to disengage the clutch member 5 after the pressure fluid hasbeen exhausted from the cylinder 16 and to autonmticallv slide theclutch member 4 into engagtanent with the clutch teeth 8 on theintermediate gear j, a plunger 23 actuated by a spring 24 is arrangedwithin a cylinder 25 and is adapted to bear with its front end againstthe yoke 03 on the opposite side of the rod y. The cylinder 25 like thecylinder 14 is provided with a similar cover plate 21 which is also heldin position by means of bolts 22.

In the operation of the device let it be assumed that it is desired torotate the railrope drum S, the throttle valve H may then be moved toadmit pressure fluid to the motor and to uncover the pipe 17 (Figure4).. In this position of the valve, air is admitted through the pipe 17and the associated passages into the rearward end of the cylinder 14.Upon the admission of pressure fluid into said cylinder, the plunger 16is forced outwardly against the yoke 0 and causes said yoke to rockabout its pivot until the clutch member 5 is brought into engagementwith the clutch teeth 8 carried by the intermediate pinion 6. Uponreversal of the throttle lever L, the air is exhausted from the cylinder14 and the plunger 23 will then be automatically forced outwardly by thespring 24. In this way, the yoke w is caused to rock in the oppositedirection whereby the clutch member 5 is drawn out of engagement withthe teeth 8 on the intermediate gear 6 and the clutch member 4 issimultaneously pressed into engagement with the teeth 8 carried by theintermediate gear 3'.

I claim: 1

1. In a hoist, the combination of a frame, a driving shaft, drumsrotatable about said driving shaft, a motor adapted to run only in onedirection and connected to rotate said shaft, a valve casing on themotor, clutches at one end of the hoist for selectively connecting thedrums with the driving shaft, and fluid actuated means for actuatingsaid clutches, said means being con nected to receive pressure fluidfrom the valve casing simultaneously with the admission of pressurefiuid to the motor.

2. In a hoist, the combination of a frame, a driving shaft, drumsrotatable about said driving shaft, a motor adapted to run in only onedirection connected to rotate said shaft, a valve casing on the motor, apair of clutches at one end of the hoist for connecting the drums withthe driving shaft, and fluid actuated means connected to receivepressure fluid from the valve casing for connecting one drum with thedrive shaft and simultaneously disconnecting the other drum from saidshaft.

3. In a hoist, the combination of a frame, a driving shaft, drumsrotatable about said driving shaft, a motor adapted to run in only onedirection connected to rotate said shaft, an oscillatory clutch yoke, apair of clutches associated with said yoke and off-set from thelongitudinal axis of the hoist, and a fluid actuated plunger associatedwith the yoke to actuate the clutches for simultaneously connecting onedrum with the driving shaft and disconnecting the other drum from saidshaft.

4. In a hoist, the combination of a frame, a driving shaft, drumsrotatable about said driving shaft, a motor adapted to run in only onedirection connected to rotate said shaft, an oscillatory clutch yokepivotedat its center, clutches supported by the ends of the yoke, acylinder, a fluid actuated plunger in said cylinder to rock the clutchyoke in one direction to enable one of the clutches to connect one ofthe drums with the driving shaft, and automatic means for rocking theyoke in the opposite direction upon the release of pressure fluid fromthe cylinder for disconnecting the first said drum from the drivingshaft and for simultaneously actuating the other clutch to connect theother drum with the driving shaft.

5. In a hoist, the combination of a frame, a driving shaft, a centerbearing supported by the frame, a pair of drums rotatable about theshaft and the center bearing, a motor adapted to run in only onedirection connected to rotate said shaft, a gear case, a pair of shaftsin said case and having polygonal portions, a gear mounted loosely oneach shaft associated with the drums and connected to be rotatated bythe driving shaft, clutch teeth carried by said gears, a clutch collararranged slidably on each shaft, a clutch yoke pivoted centrally andconnected to the clutch collars, a cylinder, a fluid actuated plunger inthe cylinder to slide one of the clutch collars into engagement with theteeth on one gear for connecting one of the drums to be rotated by thedriving shaft, a spring pressed plunger for automatically disengagingthe first said clutch collar from the teeth upon the release of pressurefluid from the cylinder and to simultaneously slide the other clutchcollar into engagement with the teeth on the other gear for connectingthe other said drum to be rotated by the driving shaft.

In testimony whereof I have signed this specification.

ARTHUR E. PETERS.

